XML 54 R53.htm IDEA: XBRL DOCUMENT

Goodwill - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended
	Mar. 31, 2013 Martin [Member]	Mar. 31, 2013 Martin [Member]	Mar. 31, 2013 Interchain [Member]	Mar. 31, 2012 MWM Acoustics [Member]	Mar. 31, 2012 MWM Acoustics [Member]
Goodwill [Line Items]
Increase in goodwill	$ 57.7	$ 57.7	$ 0.6	$ 0	$ 79.8

Change in the carrying value of goodwill. The change could be the result of new goodwill acquired, goodwill impairment, if any, goodwill written off related to the sale of a business or other adjustments to goodwill.

+ References+ Details